Kitchen slang. The abortion stick is the unbent coat hanger, kept in virtually every commercial kitchen in North America, for unclogging the spout at the bottom of the deep fryer and various other odd jobs. It is an important tool, despite being a piece of junk, and it's very annoying when the abortion stick goes missing.

John (peering into the filthy space under the fryer): Where the fuck is the abortion stick?
Jim: Your mom borrowed it.